Cassi Thomson reveals her on (and off) set fitness routine

Australian-born actress Cassi Thomson is about to make her big screen debut as Nicolas Cage's daughter 'Chloe Steele' in the action thriller 'Left Behind,' in theaters October 3rd. While Cassi may be best known for her role in HBO's 'Big Love,' we have a sneaky suspicion we'll be hearing more from the blonde beauty very soon.

The trailer for 'Left Behind' shows Cassi risking her life to reunite with her family and to help save her fathers life. In order to prepare for the role, Cassi, who is a self-proclaimed fitness and workout fanatic ramped up her fitness routine with some serious workouts. "I took Shaun T's insanity program with me and did it everyday I could! The role was very active as well, so that helped me stay in shape while at work," explained Cassi. "I do like classes," she said. "My favorite class is Cardio Barre. But I also like at home workouts. I do Insanity quite often and am now doing Shaun T's T25."

Make sure you check out Cassi Thomson and an all-star cast in the upcoming thriller 'Left Behind' hitting theaters October 3rd.